A5022609564- Marine and fisheries research
- Marine Bivalve and Aquaculture Studies
- Coral and Marine Ecosystems Studies
- Aquaculture Nutrition and Growth
- Reproductive biology and impacts on aquatic species
- Food Industry and Aquatic Biology
- Marine animal studies overview
- Marine Biology and Environmental Chemistry
- Cephalopods and Marine Biology
- Ocean Acidification Effects and Responses
- Arctic and Russian Policy Studies
- Marine and coastal plant biology
- Sperm and Testicular Function
Instituto del Mar del Peru
1997-2023
Abstract The Northern Humboldt Current System sustains one of the most productive fisheries in world. However, climate change is anticipated to negatively affect fish production this region over next few decades, and detailed analyses for many fishery resources are unavailable. We implemented a trait-based Climate Vulnerability Assessment based on expert elicitation estimate relative vulnerability 28 (benthic, demersal, pelagic) impacts by 2055; ten exposure factors (e.g., temperature,...
Recruitment success of commercially important marine resources, such as the Peruvian anchovy Engraulis ringens, is based on continuous assessment and fisheries management. Potential egg production (PEP) a valuable tool that, unlike reproductive indices, quantifies spawning activity increases likelihood better prediction recruitment. From 2000 to 2008, females >14.0 cm total length contributed largely annual PEP (more than 60%), while ranging from 12.0 14.0 TL had significant participation...
In this paper we analyze the standardized monthly anomalies of time series gonadosomatic index (GSI, 1986–2008), spawning fraction (SF, estimated by histological analysis gonads, 1992–2008), and condition factor (1986–2008) Peruvian anchovy Engraulis ringens. Statistical using filters showed, according to their mode variability, existence three distinct periods for GSI (1986–1989, 1990–2000, 2001–2008) two SF (1995–2001 2002–2008). Based on this, built patterns each period, which showed...
The time series of monthly gonadosomatic index (GSI) and biannual size at first maturity Jack mackerel Trachurus murphyiNichols 1920 in Peru between 1967 2012 is analyzed discussed. annual interannual variation the reproductive cycle was determined. It shown that T. murphyihas a single relatively extended spawning period with maximum November each year. also for more than four decades murphyi has spawned regularly every year Peruvian waters. activity greater variability off peaks lesser...
This paper describes the macroscopic scale of gonad maturity stages Jack mackerel Trachurus murphyNichols 1920, validated by microscopic studies, and being used in Peru,. A six are identified for females males, ranging from stage 0 (virgin) to V (recovery females, post-spermiation males). The gonads 350 specimens were analyzed. These collected as part a pelagic fishery monitoring programme during stock assessment surveys between 2006 2009. Virgin individuals classified (virgin), which draws...
Se evaluo el efecto de la racion alimenticia sobre tasa maduracion gonadal, desempeno las gonadas maduras y redistribucion energia consumida en gonada, musculo o grasa corporal ejemplares anchoveta peruana Engraulis ringens condiciones cautiverio Estos resultados ayudan a comprender los procesos reproductivos ocurridos medio natural ante alteraciones factores ambientales tales como eventos El Nino La Nina, gran implicancia ecosistema pesquerias del Pacifico oriental. tiempo trascurrido desde...
Se evaluo el efecto de la racion alimenticia sobre tasa maduracion gonadal, desempeno las gonadas maduras y redistribucion energia consumida en gonada, musculo o grasa corporal ejemplares anchoveta peruana Engraulis ringens condiciones cautiverio Estos resultados ayudan a comprender los procesos reproductivos ocurridos medio natural ante alteraciones factores ambientales tales como eventos El Nino La Nina, gran implicancia ecosistema pesquerias del Pacifico oriental. tiempo trascurrido desde...
In order to achieve spawning in captive Engraulis ringens that would result eggs and larvae for experimental assays, the present work evaluated effect of buserelin acetate (an analogue GnRH; GnRHa) injections on spermiation. Domperidone (DOM) was also used reject a possible dopaminergic control release endogenous gonadotropins this species. Ripe fish were injected intraperitoneally with 0.005 μg GnRHa g -1 (H), + 0.01 mg DOM (HD) or saline solution at 0.9% (SS). The GnRHa+DOM treatments...
RESUMEN.Con la finalidad de obtener desoves ejemplares Engraulis ringens en cautiverio para realizar pruebas experimentales con huevos y larvas; el presente trabajo evaluó efecto inyecciones acetato buserelina (un análogo GnRH; GnRHa) sobre desove espermiación.Además, se utilizó domperidona (DOM) eliminar un posible control dopaminérgico liberación gonadotropinas endógenas esta especie.Se inyectaron intraperitonealmente maduros 0,005 μg GnRHa g -1 pez (GnRHa); + 0,01 mg DOM (GnRHa+DOM) o...